J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include "incls/_precompiled.incl" |
| 26 | #include "incls/_interpreterRuntime.cpp.incl" |
| 27 | |
| 28 | class UnlockFlagSaver { |
| 29 | private: |
| 30 | JavaThread* _thread; |
| 31 | bool _do_not_unlock; |
| 32 | public: |
| 33 | UnlockFlagSaver(JavaThread* t) { |
| 34 | _thread = t; |
| 35 | _do_not_unlock = t->do_not_unlock_if_synchronized(); |
| 36 | t->set_do_not_unlock_if_synchronized(false); |
| 37 | } |
| 38 | ~UnlockFlagSaver() { |
| 39 | _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); |
| 40 | } |
| 41 | }; |
| 42 | |
| 43 | //------------------------------------------------------------------------------------------------------------------------ |
| 44 | // State accessors |
| 45 | |
| 46 | void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { |
| 47 | last_frame(thread).interpreter_frame_set_bcp(bcp); |
| 48 | if (ProfileInterpreter) { |
| 49 | // ProfileTraps uses MDOs independently of ProfileInterpreter. |
| 50 | // That is why we must check both ProfileInterpreter and mdo != NULL. |
| 51 | methodDataOop mdo = last_frame(thread).interpreter_frame_method()->method_data(); |
| 52 | if (mdo != NULL) { |
| 53 | NEEDS_CLEANUP; |
| 54 | last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); |
| 55 | } |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | //------------------------------------------------------------------------------------------------------------------------ |
| 60 | // Constants |
| 61 | |
| 62 | |
| 63 | IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) |
| 64 | // access constant pool |
| 65 | constantPoolOop pool = method(thread)->constants(); |
| 66 | int index = wide ? two_byte_index(thread) : one_byte_index(thread); |
| 67 | constantTag tag = pool->tag_at(index); |
| 68 | |
| 69 | if (tag.is_unresolved_klass() || tag.is_klass()) { |
| 70 | klassOop klass = pool->klass_at(index, CHECK); |
| 71 | oop java_class = klass->klass_part()->java_mirror(); |
| 72 | thread->set_vm_result(java_class); |
| 73 | } else { |
| 74 | #ifdef ASSERT |
| 75 | // If we entered this runtime routine, we believed the tag contained |
| 76 | // an unresolved string, an unresolved class or a resolved class. |
| 77 | // However, another thread could have resolved the unresolved string |
| 78 | // or class by the time we go there. |
| 79 | assert(tag.is_unresolved_string()|| tag.is_string(), "expected string"); |
| 80 | #endif |
| 81 | oop s_oop = pool->string_at(index, CHECK); |
| 82 | thread->set_vm_result(s_oop); |
| 83 | } |
| 84 | IRT_END |
| 85 | |
| 86 | |
| 87 | //------------------------------------------------------------------------------------------------------------------------ |
| 88 | // Allocation |
| 89 | |
| 90 | IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index)) |
| 91 | klassOop k_oop = pool->klass_at(index, CHECK); |
| 92 | instanceKlassHandle klass (THREAD, k_oop); |
| 93 | |
| 94 | // Make sure we are not instantiating an abstract klass |
| 95 | klass->check_valid_for_instantiation(true, CHECK); |
| 96 | |
| 97 | // Make sure klass is initialized |
| 98 | klass->initialize(CHECK); |
| 99 | |
| 100 | // At this point the class may not be fully initialized |
| 101 | // because of recursive initialization. If it is fully |
| 102 | // initialized & has_finalized is not set, we rewrite |
| 103 | // it into its fast version (Note: no locking is needed |
| 104 | // here since this is an atomic byte write and can be |
| 105 | // done more than once). |
| 106 | // |
| 107 | // Note: In case of classes with has_finalized we don't |
| 108 | // rewrite since that saves us an extra check in |
| 109 | // the fast version which then would call the |
| 110 | // slow version anyway (and do a call back into |
| 111 | // Java). |
| 112 | // If we have a breakpoint, then we don't rewrite |
| 113 | // because the _breakpoint bytecode would be lost. |
| 114 | oop obj = klass->allocate_instance(CHECK); |
| 115 | thread->set_vm_result(obj); |
| 116 | IRT_END |
| 117 | |
| 118 | |
| 119 | IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) |
| 120 | oop obj = oopFactory::new_typeArray(type, size, CHECK); |
| 121 | thread->set_vm_result(obj); |
| 122 | IRT_END |
| 123 | |
| 124 | |
| 125 | IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size)) |
| 126 | // Note: no oopHandle for pool & klass needed since they are not used |
| 127 | // anymore after new_objArray() and no GC can happen before. |
| 128 | // (This may have to change if this code changes!) |
| 129 | klassOop klass = pool->klass_at(index, CHECK); |
| 130 | objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); |
| 131 | thread->set_vm_result(obj); |
| 132 | IRT_END |
| 133 | |
| 134 | |
| 135 | IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) |
| 136 | // We may want to pass in more arguments - could make this slightly faster |
| 137 | constantPoolOop constants = method(thread)->constants(); |
| 138 | int i = two_byte_index(thread); |
| 139 | klassOop klass = constants->klass_at(i, CHECK); |
| 140 | int nof_dims = number_of_dimensions(thread); |
| 141 | assert(oop(klass)->is_klass(), "not a class"); |
| 142 | assert(nof_dims >= 1, "multianewarray rank must be nonzero"); |
| 143 | |
| 144 | // We must create an array of jints to pass to multi_allocate. |
| 145 | ResourceMark rm(thread); |
| 146 | const int small_dims = 10; |
| 147 | jint dim_array[small_dims]; |
| 148 | jint *dims = &dim_array[0]; |
| 149 | if (nof_dims > small_dims) { |
| 150 | dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); |
| 151 | } |
| 152 | for (int index = 0; index < nof_dims; index++) { |
| 153 | // offset from first_size_address is addressed as local[index] |
| 154 | int n = Interpreter::local_offset_in_bytes(index)/jintSize; |
| 155 | dims[index] = first_size_address[n]; |
| 156 | } |
| 157 | oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); |
| 158 | thread->set_vm_result(obj); |
| 159 | IRT_END |
| 160 | |
| 161 | |
| 162 | IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) |
| 163 | assert(obj->is_oop(), "must be a valid oop"); |
| 164 | assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); |
| 165 | instanceKlass::register_finalizer(instanceOop(obj), CHECK); |
| 166 | IRT_END |
| 167 | |
| 168 | |
| 169 | // Quicken instance-of and check-cast bytecodes |
| 170 | IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) |
| 171 | // Force resolving; quicken the bytecode |
| 172 | int which = two_byte_index(thread); |
| 173 | constantPoolOop cpool = method(thread)->constants(); |
| 174 | // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded |
| 175 | // program we might have seen an unquick'd bytecode in the interpreter but have another |
| 176 | // thread quicken the bytecode before we get here. |
| 177 | // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); |
| 178 | klassOop klass = cpool->klass_at(which, CHECK); |
| 179 | thread->set_vm_result(klass); |
| 180 | IRT_END |
| 181 | |
| 182 | |
| 183 | //------------------------------------------------------------------------------------------------------------------------ |
| 184 | // Exceptions |
| 185 | |
| 186 | // Assume the compiler is (or will be) interested in this event. |
| 187 | // If necessary, create an MDO to hold the information, and record it. |
| 188 | void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { |
| 189 | assert(ProfileTraps, "call me only if profiling"); |
| 190 | methodHandle trap_method(thread, method(thread)); |
| 191 | if (trap_method.not_null()) { |
| 192 | methodDataHandle trap_mdo(thread, trap_method->method_data()); |
| 193 | if (trap_mdo.is_null()) { |
| 194 | methodOopDesc::build_interpreter_method_data(trap_method, THREAD); |
| 195 | if (HAS_PENDING_EXCEPTION) { |
| 196 | assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); |
| 197 | CLEAR_PENDING_EXCEPTION; |
| 198 | } |
| 199 | trap_mdo = methodDataHandle(thread, trap_method->method_data()); |
| 200 | // and fall through... |
| 201 | } |
| 202 | if (trap_mdo.not_null()) { |
| 203 | // Update per-method count of trap events. The interpreter |
| 204 | // is updating the MDO to simulate the effect of compiler traps. |
| 205 | int trap_bci = trap_method->bci_from(bcp(thread)); |
| 206 | Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); |
| 207 | } |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | static Handle get_preinitialized_exception(klassOop k, TRAPS) { |
| 212 | // get klass |
| 213 | instanceKlass* klass = instanceKlass::cast(k); |
| 214 | assert(klass->is_initialized(), |
| 215 | "this klass should have been initialized during VM initialization"); |
| 216 | // create instance - do not call constructor since we may have no |
| 217 | // (java) stack space left (should assert constructor is empty) |
| 218 | Handle exception; |
| 219 | oop exception_oop = klass->allocate_instance(CHECK_(exception)); |
| 220 | exception = Handle(THREAD, exception_oop); |
| 221 | if (StackTraceInThrowable) { |
| 222 | java_lang_Throwable::fill_in_stack_trace(exception); |
| 223 | } |
| 224 | return exception; |
| 225 | } |
| 226 | |
| 227 | // Special handling for stack overflow: since we don't have any (java) stack |
| 228 | // space left we use the pre-allocated & pre-initialized StackOverflowError |
| 229 | // klass to create an stack overflow error instance. We do not call its |
| 230 | // constructor for the same reason (it is empty, anyway). |
| 231 | IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) |
| 232 | Handle exception = get_preinitialized_exception( |
| 233 | SystemDictionary::StackOverflowError_klass(), |
| 234 | CHECK); |
| 235 | THROW_HANDLE(exception); |
| 236 | IRT_END |
| 237 | |
| 238 | |
| 239 | IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) |
| 240 | // lookup exception klass |
| 241 | symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); |
| 242 | if (ProfileTraps) { |
| 243 | if (s == vmSymbols::java_lang_ArithmeticException()) { |
| 244 | note_trap(thread, Deoptimization::Reason_div0_check, CHECK); |
| 245 | } else if (s == vmSymbols::java_lang_NullPointerException()) { |
| 246 | note_trap(thread, Deoptimization::Reason_null_check, CHECK); |
| 247 | } |
| 248 | } |
| 249 | // create exception |
| 250 | Handle exception = Exceptions::new_exception(thread, s(), message); |
| 251 | thread->set_vm_result(exception()); |
| 252 | IRT_END |
| 253 | |
| 254 | |
| 255 | IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) |
| 256 | ResourceMark rm(thread); |
| 257 | const char* klass_name = Klass::cast(obj->klass())->external_name(); |
| 258 | // lookup exception klass |
| 259 | symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); |
| 260 | if (ProfileTraps) { |
| 261 | note_trap(thread, Deoptimization::Reason_class_check, CHECK); |
| 262 | } |
| 263 | // create exception, with klass name as detail message |
| 264 | Handle exception = Exceptions::new_exception(thread, s(), klass_name); |
| 265 | thread->set_vm_result(exception()); |
| 266 | IRT_END |
| 267 | |
| 268 | |
| 269 | IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) |
| 270 | char message[jintAsStringSize]; |
| 271 | // lookup exception klass |
| 272 | symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); |
| 273 | if (ProfileTraps) { |
| 274 | note_trap(thread, Deoptimization::Reason_range_check, CHECK); |
| 275 | } |
| 276 | // create exception |
| 277 | sprintf(message, "%d", index); |
| 278 | THROW_MSG(s(), message); |
| 279 | IRT_END |
| 280 | |
| 281 | IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( |
| 282 | JavaThread* thread, oopDesc* obj)) |
| 283 | |
| 284 | ResourceMark rm(thread); |
| 285 | char* message = SharedRuntime::generate_class_cast_message( |
| 286 | thread, Klass::cast(obj->klass())->external_name()); |
| 287 | |
| 288 | if (ProfileTraps) { |
| 289 | note_trap(thread, Deoptimization::Reason_class_check, CHECK); |
| 290 | } |
| 291 | |
| 292 | // create exception |
| 293 | THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); |
| 294 | IRT_END |
| 295 | |
| 296 | |
| 297 | // exception_handler_for_exception(...) returns the continuation address, |
| 298 | // the exception oop (via TLS) and sets the bci/bcp for the continuation. |
| 299 | // The exception oop is returned to make sure it is preserved over GC (it |
| 300 | // is only on the stack if the exception was thrown explicitly via athrow). |
| 301 | // During this operation, the expression stack contains the values for the |
| 302 | // bci where the exception happened. If the exception was propagated back |
| 303 | // from a call, the expression stack contains the values for the bci at the |
| 304 | // invoke w/o arguments (i.e., as if one were inside the call). |
| 305 | IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) |
| 306 | |
| 307 | Handle h_exception(thread, exception); |
| 308 | methodHandle h_method (thread, method(thread)); |
| 309 | constantPoolHandle h_constants(thread, h_method->constants()); |
| 310 | typeArrayHandle h_extable (thread, h_method->exception_table()); |
| 311 | bool should_repeat; |
| 312 | int handler_bci; |
| 313 | int current_bci = bcp(thread) - h_method->code_base(); |
| 314 | |
| 315 | // Need to do this check first since when _do_not_unlock_if_synchronized |
| 316 | // is set, we don't want to trigger any classloading which may make calls |
| 317 | // into java, or surprisingly find a matching exception handler for bci 0 |
| 318 | // since at this moment the method hasn't been "officially" entered yet. |
| 319 | if (thread->do_not_unlock_if_synchronized()) { |
| 320 | ResourceMark rm; |
| 321 | assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); |
| 322 | thread->set_vm_result(exception); |
| 323 | #ifdef CC_INTERP |
| 324 | return (address) -1; |
| 325 | #else |
| 326 | return Interpreter::remove_activation_entry(); |
| 327 | #endif |
| 328 | } |
| 329 | |
| 330 | do { |
| 331 | should_repeat = false; |
| 332 | |
| 333 | // assertions |
| 334 | #ifdef ASSERT |
| 335 | assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); |
| 336 | assert(h_exception->is_oop(), "just checking"); |
| 337 | // Check that exception is a subclass of Throwable, otherwise we have a VerifyError |
| 338 | if (!(h_exception->is_a(SystemDictionary::throwable_klass()))) { |
| 339 | if (ExitVMOnVerifyError) vm_exit(-1); |
| 340 | ShouldNotReachHere(); |
| 341 | } |
| 342 | #endif |
| 343 | |
| 344 | // tracing |
| 345 | if (TraceExceptions) { |
| 346 | ttyLocker ttyl; |
| 347 | ResourceMark rm(thread); |
| 348 | tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); |
| 349 | tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); |
| 350 | tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); |
| 351 | } |
| 352 | // Don't go paging in something which won't be used. |
| 353 | // else if (h_extable->length() == 0) { |
| 354 | // // disabled for now - interpreter is not using shortcut yet |
| 355 | // // (shortcut is not to call runtime if we have no exception handlers) |
| 356 | // // warning("performance bug: should not call runtime if method has no exception handlers"); |
| 357 | // } |
| 358 | // for AbortVMOnException flag |
| 359 | NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); |
| 360 | |
| 361 | // exception handler lookup |
| 362 | KlassHandle h_klass(THREAD, h_exception->klass()); |
| 363 | handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); |
| 364 | if (HAS_PENDING_EXCEPTION) { |
| 365 | // We threw an exception while trying to find the exception handler. |
| 366 | // Transfer the new exception to the exception handle which will |
| 367 | // be set into thread local storage, and do another lookup for an |
| 368 | // exception handler for this exception, this time starting at the |
| 369 | // BCI of the exception handler which caused the exception to be |
| 370 | // thrown (bug 4307310). |
| 371 | h_exception = Handle(THREAD, PENDING_EXCEPTION); |
| 372 | CLEAR_PENDING_EXCEPTION; |
| 373 | if (handler_bci >= 0) { |
| 374 | current_bci = handler_bci; |
| 375 | should_repeat = true; |
| 376 | } |
| 377 | } |
| 378 | } while (should_repeat == true); |
| 379 | |
| 380 | // notify JVMTI of an exception throw; JVMTI will detect if this is a first |
| 381 | // time throw or a stack unwinding throw and accordingly notify the debugger |
| 382 | if (JvmtiExport::can_post_exceptions()) { |
| 383 | JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); |
| 384 | } |
| 385 | |
| 386 | #ifdef CC_INTERP |
| 387 | address continuation = (address)(intptr_t) handler_bci; |
| 388 | #else |
| 389 | address continuation = NULL; |
| 390 | #endif |
| 391 | address handler_pc = NULL; |
| 392 | if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { |
| 393 | // Forward exception to callee (leaving bci/bcp untouched) because (a) no |
| 394 | // handler in this method, or (b) after a stack overflow there is not yet |
| 395 | // enough stack space available to reprotect the stack. |
| 396 | #ifndef CC_INTERP |
| 397 | continuation = Interpreter::remove_activation_entry(); |
| 398 | #endif |
| 399 | // Count this for compilation purposes |
| 400 | h_method->interpreter_throwout_increment(); |
| 401 | } else { |
| 402 | // handler in this method => change bci/bcp to handler bci/bcp and continue there |
| 403 | handler_pc = h_method->code_base() + handler_bci; |
| 404 | #ifndef CC_INTERP |
| 405 | set_bcp_and_mdp(handler_pc, thread); |
| 406 | continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; |
| 407 | #endif |
| 408 | } |
| 409 | // notify debugger of an exception catch |
| 410 | // (this is good for exceptions caught in native methods as well) |
| 411 | if (JvmtiExport::can_post_exceptions()) { |
| 412 | JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); |
| 413 | } |
| 414 | |
| 415 | thread->set_vm_result(h_exception()); |
| 416 | return continuation; |
| 417 | IRT_END |
| 418 | |
| 419 | |
| 420 | IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) |
| 421 | assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); |
| 422 | // nothing to do - eventually we should remove this code entirely (see comments @ call sites) |
| 423 | IRT_END |
| 424 | |
| 425 | |
| 426 | IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) |
| 427 | THROW(vmSymbols::java_lang_AbstractMethodError()); |
| 428 | IRT_END |
| 429 | |
| 430 | |
| 431 | IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
| 432 | THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); |
| 433 | IRT_END |
| 434 | |
| 435 | |
| 436 | //------------------------------------------------------------------------------------------------------------------------ |
| 437 | // Fields |
| 438 | // |
| 439 | |
| 440 | IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) |
| 441 | // resolve field |
| 442 | FieldAccessInfo info; |
| 443 | constantPoolHandle pool(thread, method(thread)->constants()); |
| 444 | bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); |
| 445 | |
| 446 | { |
| 447 | JvmtiHideSingleStepping jhss(thread); |
| 448 | LinkResolver::resolve_field(info, pool, two_byte_index(thread), |
| 449 | bytecode, false, CHECK); |
| 450 | } // end JvmtiHideSingleStepping |
| 451 | |
| 452 | // check if link resolution caused cpCache to be updated |
| 453 | if (already_resolved(thread)) return; |
| 454 | |
| 455 | // compute auxiliary field attributes |
| 456 | TosState state = as_TosState(info.field_type()); |
| 457 | |
| 458 | // We need to delay resolving put instructions on final fields |
| 459 | // until we actually invoke one. This is required so we throw |
| 460 | // exceptions at the correct place. If we do not resolve completely |
| 461 | // in the current pass, leaving the put_code set to zero will |
| 462 | // cause the next put instruction to reresolve. |
| 463 | bool is_put = (bytecode == Bytecodes::_putfield || |
| 464 | bytecode == Bytecodes::_putstatic); |
| 465 | Bytecodes::Code put_code = (Bytecodes::Code)0; |
| 466 | |
| 467 | // We also need to delay resolving getstatic instructions until the |
| 468 | // class is intitialized. This is required so that access to the static |
| 469 | // field will call the initialization function every time until the class |
| 470 | // is completely initialized ala. in 2.17.5 in JVM Specification. |
| 471 | instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); |
| 472 | bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && |
| 473 | !klass->is_initialized()); |
| 474 | Bytecodes::Code get_code = (Bytecodes::Code)0; |
| 475 | |
| 476 | |
| 477 | if (!uninitialized_static) { |
| 478 | get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); |
| 479 | if (is_put || !info.access_flags().is_final()) { |
| 480 | put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | cache_entry(thread)->set_field( |
| 485 | get_code, |
| 486 | put_code, |
| 487 | info.klass(), |
| 488 | info.field_index(), |
| 489 | info.field_offset(), |
| 490 | state, |
| 491 | info.access_flags().is_final(), |
| 492 | info.access_flags().is_volatile() |
| 493 | ); |
| 494 | IRT_END |
| 495 | |
| 496 | |
| 497 | //------------------------------------------------------------------------------------------------------------------------ |
| 498 | // Synchronization |
| 499 | // |
| 500 | // The interpreter's synchronization code is factored out so that it can |
| 501 | // be shared by method invocation and synchronized blocks. |
| 502 | //%note synchronization_3 |
| 503 | |
| 504 | static void trace_locking(Handle& h_locking_obj, bool is_locking) { |
| 505 | ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); |
| 506 | } |
| 507 | |
| 508 | |
| 509 | //%note monitor_1 |
| 510 | IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) |
| 511 | #ifdef ASSERT |
| 512 | thread->last_frame().interpreter_frame_verify_monitor(elem); |
| 513 | #endif |
| 514 | if (PrintBiasedLockingStatistics) { |
| 515 | Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); |
| 516 | } |
| 517 | Handle h_obj(thread, elem->obj()); |
| 518 | assert(Universe::heap()->is_in_reserved_or_null(h_obj()), |
| 519 | "must be NULL or an object"); |
| 520 | if (UseBiasedLocking) { |
| 521 | // Retry fast entry if bias is revoked to avoid unnecessary inflation |
| 522 | ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); |
| 523 | } else { |
| 524 | ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); |
| 525 | } |
| 526 | assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), |
| 527 | "must be NULL or an object"); |
| 528 | #ifdef ASSERT |
| 529 | thread->last_frame().interpreter_frame_verify_monitor(elem); |
| 530 | #endif |
| 531 | IRT_END |
| 532 | |
| 533 | |
| 534 | //%note monitor_1 |
| 535 | IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) |
| 536 | #ifdef ASSERT |
| 537 | thread->last_frame().interpreter_frame_verify_monitor(elem); |
| 538 | #endif |
| 539 | Handle h_obj(thread, elem->obj()); |
| 540 | assert(Universe::heap()->is_in_reserved_or_null(h_obj()), |
| 541 | "must be NULL or an object"); |
| 542 | if (elem == NULL || h_obj()->is_unlocked()) { |
| 543 | THROW(vmSymbols::java_lang_IllegalMonitorStateException()); |
| 544 | } |
| 545 | ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); |
| 546 | // Free entry. This must be done here, since a pending exception might be installed on |
| 547 | // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. |
| 548 | elem->set_obj(NULL); |
| 549 | #ifdef ASSERT |
| 550 | thread->last_frame().interpreter_frame_verify_monitor(elem); |
| 551 | #endif |
| 552 | IRT_END |
| 553 | |
| 554 | |
| 555 | IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) |
| 556 | THROW(vmSymbols::java_lang_IllegalMonitorStateException()); |
| 557 | IRT_END |
| 558 | |
| 559 | |
| 560 | IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) |
| 561 | // Returns an illegal exception to install into the current thread. The |
| 562 | // pending_exception flag is cleared so normal exception handling does not |
| 563 | // trigger. Any current installed exception will be overwritten. This |
| 564 | // method will be called during an exception unwind. |
| 565 | |
| 566 | assert(!HAS_PENDING_EXCEPTION, "no pending exception"); |
| 567 | Handle exception(thread, thread->vm_result()); |
| 568 | assert(exception() != NULL, "vm result should be set"); |
| 569 | thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) |
| 570 | if (!exception->is_a(SystemDictionary::threaddeath_klass())) { |
| 571 | exception = get_preinitialized_exception( |
| 572 | SystemDictionary::IllegalMonitorStateException_klass(), |
| 573 | CATCH); |
| 574 | } |
| 575 | thread->set_vm_result(exception()); |
| 576 | IRT_END |
| 577 | |
| 578 | |
| 579 | //------------------------------------------------------------------------------------------------------------------------ |
| 580 | // Invokes |
| 581 | |
| 582 | IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) |
| 583 | return method->orig_bytecode_at(method->bci_from(bcp)); |
| 584 | IRT_END |
| 585 | |
| 586 | IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) |
| 587 | method->set_orig_bytecode_at(method->bci_from(bcp), new_code); |
| 588 | IRT_END |
| 589 | |
| 590 | IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) |
| 591 | JvmtiExport::post_raw_breakpoint(thread, method, bcp); |
| 592 | IRT_END |
| 593 | |
| 594 | IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) |
| 595 | // extract receiver from the outgoing argument list if necessary |
| 596 | Handle receiver(thread, NULL); |
| 597 | if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { |
| 598 | ResourceMark rm(thread); |
| 599 | methodHandle m (thread, method(thread)); |
| 600 | int bci = m->bci_from(bcp(thread)); |
| 601 | Bytecode_invoke* call = Bytecode_invoke_at(m, bci); |
| 602 | symbolHandle signature (thread, call->signature()); |
| 603 | receiver = Handle(thread, |
| 604 | thread->last_frame().interpreter_callee_receiver(signature)); |
| 605 | assert(Universe::heap()->is_in_reserved_or_null(receiver()), |
| 606 | "sanity check"); |
| 607 | assert(receiver.is_null() || |
| 608 | Universe::heap()->is_in_reserved(receiver->klass()), |
| 609 | "sanity check"); |
| 610 | } |
| 611 | |
| 612 | // resolve method |
| 613 | CallInfo info; |
| 614 | constantPoolHandle pool(thread, method(thread)->constants()); |
| 615 | |
| 616 | { |
| 617 | JvmtiHideSingleStepping jhss(thread); |
| 618 | LinkResolver::resolve_invoke(info, receiver, pool, |
| 619 | two_byte_index(thread), bytecode, CHECK); |
| 620 | if (JvmtiExport::can_hotswap_or_post_breakpoint()) { |
| 621 | int retry_count = 0; |
| 622 | while (info.resolved_method()->is_old()) { |
| 623 | // It is very unlikely that method is redefined more than 100 times |
| 624 | // in the middle of resolve. If it is looping here more than 100 times |
| 625 | // means then there could be a bug here. |
| 626 | guarantee((retry_count++ < 100), |
| 627 | "Could not resolve to latest version of redefined method"); |
| 628 | // method is redefined in the middle of resolve so re-try. |
| 629 | LinkResolver::resolve_invoke(info, receiver, pool, |
| 630 | two_byte_index(thread), bytecode, CHECK); |
| 631 | } |
| 632 | } |
| 633 | } // end JvmtiHideSingleStepping |
| 634 | |
| 635 | // check if link resolution caused cpCache to be updated |
| 636 | if (already_resolved(thread)) return; |
| 637 | |
| 638 | if (bytecode == Bytecodes::_invokeinterface) { |
| 639 | |
| 640 | if (TraceItables && Verbose) { |
| 641 | ResourceMark rm(thread); |
| 642 | tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); |
| 643 | } |
| 644 | if (info.resolved_method()->method_holder() == |
| 645 | SystemDictionary::object_klass()) { |
| 646 | // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec |
| 647 | // (see also cpCacheOop.cpp for details) |
| 648 | methodHandle rm = info.resolved_method(); |
| 649 | assert(rm->is_final() || info.has_vtable_index(), |
| 650 | "should have been set already"); |
| 651 | cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); |
| 652 | } else { |
| 653 | // Setup itable entry |
| 654 | int index = klassItable::compute_itable_index(info.resolved_method()()); |
| 655 | cache_entry(thread)->set_interface_call(info.resolved_method(), index); |
| 656 | } |
| 657 | } else { |
| 658 | cache_entry(thread)->set_method( |
| 659 | bytecode, |
| 660 | info.resolved_method(), |
| 661 | info.vtable_index()); |
| 662 | } |
| 663 | IRT_END |
| 664 | |
| 665 | |
| 666 | //------------------------------------------------------------------------------------------------------------------------ |
| 667 | // Miscellaneous |
| 668 | |
| 669 | |
| 670 | #ifndef PRODUCT |
| 671 | static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci, address branch_bcp) { |
| 672 | if (TraceInvocationCounterOverflow) { |
| 673 | InvocationCounter* ic = m->invocation_counter(); |
| 674 | InvocationCounter* bc = m->backedge_counter(); |
| 675 | ResourceMark rm; |
| 676 | const char* msg = |
| 677 | branch_bcp == NULL |
| 678 | ? "comp-policy cntr ovfl @ %d in entry of " |
| 679 | : "comp-policy cntr ovfl @ %d in loop of "; |
| 680 | tty->print(msg, bci); |
| 681 | m->print_value(); |
| 682 | tty->cr(); |
| 683 | ic->print(); |
| 684 | bc->print(); |
| 685 | if (ProfileInterpreter) { |
| 686 | if (branch_bcp != NULL) { |
| 687 | methodDataOop mdo = m->method_data(); |
| 688 | if (mdo != NULL) { |
| 689 | int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken(); |
| 690 | tty->print_cr("back branch count = %d", count); |
| 691 | } |
| 692 | } |
| 693 | } |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | static void trace_osr_request(methodHandle method, nmethod* osr, int bci) { |
| 698 | if (TraceOnStackReplacement) { |
| 699 | ResourceMark rm; |
| 700 | tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for "); |
| 701 | method->print_short_name(tty); |
| 702 | tty->print_cr(" at bci %d", bci); |
| 703 | } |
| 704 | } |
| 705 | #endif // !PRODUCT |
| 706 | |
| 707 | IRT_ENTRY(nmethod*, |
| 708 | InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp)) |
| 709 | // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
| 710 | // flag, in case this method triggers classloading which will call into Java. |
| 711 | UnlockFlagSaver fs(thread); |
| 712 | |
| 713 | frame fr = thread->last_frame(); |
| 714 | assert(fr.is_interpreted_frame(), "must come from interpreter"); |
| 715 | methodHandle method(thread, fr.interpreter_frame_method()); |
| 716 | const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : 0; |
| 717 | const int bci = method->bci_from(fr.interpreter_frame_bcp()); |
| 718 | NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci, branch_bcp);) |
| 719 | |
| 720 | if (JvmtiExport::can_post_interpreter_events()) { |
| 721 | if (thread->is_interp_only_mode()) { |
| 722 | // If certain JVMTI events (e.g. frame pop event) are requested then the |
| 723 | // thread is forced to remain in interpreted code. This is |
| 724 | // implemented partly by a check in the run_compiled_code |
| 725 | // section of the interpreter whether we should skip running |
| 726 | // compiled code, and partly by skipping OSR compiles for |
| 727 | // interpreted-only threads. |
| 728 | if (branch_bcp != NULL) { |
| 729 | CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); |
| 730 | return NULL; |
| 731 | } |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | if (branch_bcp == NULL) { |
| 736 | // when code cache is full, compilation gets switched off, UseCompiler |
| 737 | // is set to false |
| 738 | if (!method->has_compiled_code() && UseCompiler) { |
| 739 | CompilationPolicy::policy()->method_invocation_event(method, CHECK_NULL); |
| 740 | } else { |
| 741 | // Force counter overflow on method entry, even if no compilation |
| 742 | // happened. (The method_invocation_event call does this also.) |
| 743 | CompilationPolicy::policy()->reset_counter_for_invocation_event(method); |
| 744 | } |
| 745 | // compilation at an invocation overflow no longer goes and retries test for |
| 746 | // compiled method. We always run the loser of the race as interpreted. |
| 747 | // so return NULL |
| 748 | return NULL; |
| 749 | } else { |
| 750 | // counter overflow in a loop => try to do on-stack-replacement |
| 751 | nmethod* osr_nm = method->lookup_osr_nmethod_for(bci); |
| 752 | NOT_PRODUCT(trace_osr_request(method, osr_nm, bci);) |
| 753 | // when code cache is full, we should not compile any more... |
| 754 | if (osr_nm == NULL && UseCompiler) { |
| 755 | const int branch_bci = method->bci_from(branch_bcp); |
| 756 | CompilationPolicy::policy()->method_back_branch_event(method, branch_bci, bci, CHECK_NULL); |
| 757 | osr_nm = method->lookup_osr_nmethod_for(bci); |
| 758 | } |
| 759 | if (osr_nm == NULL) { |
| 760 | CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); |
| 761 | return NULL; |
| 762 | } else { |
| 763 | // We may need to do on-stack replacement which requires that no |
| 764 | // monitors in the activation are biased because their |
| 765 | // BasicObjectLocks will need to migrate during OSR. Force |
| 766 | // unbiasing of all monitors in the activation now (even though |
| 767 | // the OSR nmethod might be invalidated) because we don't have a |
| 768 | // safepoint opportunity later once the migration begins. |
| 769 | if (UseBiasedLocking) { |
| 770 | ResourceMark rm; |
| 771 | GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); |
| 772 | for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); |
| 773 | kptr < fr.interpreter_frame_monitor_begin(); |
| 774 | kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { |
| 775 | if( kptr->obj() != NULL ) { |
| 776 | objects_to_revoke->append(Handle(THREAD, kptr->obj())); |
| 777 | } |
| 778 | } |
| 779 | BiasedLocking::revoke(objects_to_revoke); |
| 780 | } |
| 781 | |
| 782 | return osr_nm; |
| 783 | } |
| 784 | } |
| 785 | IRT_END |
| 786 | |
| 787 | IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) |
| 788 | assert(ProfileInterpreter, "must be profiling interpreter"); |
| 789 | int bci = method->bci_from(cur_bcp); |
| 790 | methodDataOop mdo = method->method_data(); |
| 791 | if (mdo == NULL) return 0; |
| 792 | return mdo->bci_to_di(bci); |
| 793 | IRT_END |
| 794 | |
| 795 | IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp)) |
| 796 | // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
| 797 | // flag, in case this method triggers classloading which will call into Java. |
| 798 | UnlockFlagSaver fs(thread); |
| 799 | |
| 800 | assert(ProfileInterpreter, "must be profiling interpreter"); |
| 801 | frame fr = thread->last_frame(); |
| 802 | assert(fr.is_interpreted_frame(), "must come from interpreter"); |
| 803 | methodHandle method(thread, fr.interpreter_frame_method()); |
| 804 | int bci = method->bci_from(cur_bcp); |
| 805 | methodOopDesc::build_interpreter_method_data(method, THREAD); |
| 806 | if (HAS_PENDING_EXCEPTION) { |
| 807 | assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); |
| 808 | CLEAR_PENDING_EXCEPTION; |
| 809 | // and fall through... |
| 810 | } |
| 811 | methodDataOop mdo = method->method_data(); |
| 812 | if (mdo == NULL) return 0; |
| 813 | return mdo->bci_to_di(bci); |
| 814 | IRT_END |
| 815 | |
| 816 | |
| 817 | #ifdef ASSERT |
| 818 | IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) |
| 819 | assert(ProfileInterpreter, "must be profiling interpreter"); |
| 820 | |
| 821 | methodDataOop mdo = method->method_data(); |
| 822 | assert(mdo != NULL, "must not be null"); |
| 823 | |
| 824 | int bci = method->bci_from(bcp); |
| 825 | |
| 826 | address mdp2 = mdo->bci_to_dp(bci); |
| 827 | if (mdp != mdp2) { |
| 828 | ResourceMark rm; |
| 829 | ResetNoHandleMark rnm; // In a LEAF entry. |
| 830 | HandleMark hm; |
| 831 | tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); |
| 832 | int current_di = mdo->dp_to_di(mdp); |
| 833 | int expected_di = mdo->dp_to_di(mdp2); |
| 834 | tty->print_cr(" actual di %d expected di %d", current_di, expected_di); |
| 835 | int expected_approx_bci = mdo->data_at(expected_di)->bci(); |
| 836 | int approx_bci = -1; |
| 837 | if (current_di >= 0) { |
| 838 | approx_bci = mdo->data_at(current_di)->bci(); |
| 839 | } |
| 840 | tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); |
| 841 | mdo->print_on(tty); |
| 842 | method->print_codes(); |
| 843 | } |
| 844 | assert(mdp == mdp2, "wrong mdp"); |
| 845 | IRT_END |
| 846 | #endif // ASSERT |
| 847 | |
| 848 | IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) |
| 849 | assert(ProfileInterpreter, "must be profiling interpreter"); |
| 850 | ResourceMark rm(thread); |
| 851 | HandleMark hm(thread); |
| 852 | frame fr = thread->last_frame(); |
| 853 | assert(fr.is_interpreted_frame(), "must come from interpreter"); |
| 854 | methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); |
| 855 | |
| 856 | // Grab a lock to ensure atomic access to setting the return bci and |
| 857 | // the displacement. This can block and GC, invalidating all naked oops. |
| 858 | MutexLocker ml(RetData_lock); |
| 859 | |
| 860 | // ProfileData is essentially a wrapper around a derived oop, so we |
| 861 | // need to take the lock before making any ProfileData structures. |
| 862 | ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); |
| 863 | RetData* rdata = data->as_RetData(); |
| 864 | address new_mdp = rdata->fixup_ret(return_bci, h_mdo); |
| 865 | fr.interpreter_frame_set_mdp(new_mdp); |
| 866 | IRT_END |
| 867 | |
| 868 | |
| 869 | IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) |
| 870 | // We used to need an explict preserve_arguments here for invoke bytecodes. However, |
| 871 | // stack traversal automatically takes care of preserving arguments for invoke, so |
| 872 | // this is no longer needed. |
| 873 | |
| 874 | // IRT_END does an implicit safepoint check, hence we are guaranteed to block |
| 875 | // if this is called during a safepoint |
| 876 | |
| 877 | if (JvmtiExport::should_post_single_step()) { |
| 878 | // We are called during regular safepoints and when the VM is |
| 879 | // single stepping. If any thread is marked for single stepping, |
| 880 | // then we may have JVMTI work to do. |
| 881 | JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); |
| 882 | } |
| 883 | IRT_END |
| 884 | |
| 885 | IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, |
| 886 | ConstantPoolCacheEntry *cp_entry)) |
| 887 | |
| 888 | // check the access_flags for the field in the klass |
| 889 | instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1()); |
| 890 | typeArrayOop fields = ik->fields(); |
| 891 | int index = cp_entry->field_index(); |
| 892 | assert(index < fields->length(), "holders field index is out of range"); |
| 893 | // bail out if field accesses are not watched |
| 894 | if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; |
| 895 | |
| 896 | switch(cp_entry->flag_state()) { |
| 897 | case btos: // fall through |
| 898 | case ctos: // fall through |
| 899 | case stos: // fall through |
| 900 | case itos: // fall through |
| 901 | case ftos: // fall through |
| 902 | case ltos: // fall through |
| 903 | case dtos: // fall through |
| 904 | case atos: break; |
| 905 | default: ShouldNotReachHere(); return; |
| 906 | } |
| 907 | bool is_static = (obj == NULL); |
| 908 | HandleMark hm(thread); |
| 909 | |
| 910 | Handle h_obj; |
| 911 | if (!is_static) { |
| 912 | // non-static field accessors have an object, but we need a handle |
| 913 | h_obj = Handle(thread, obj); |
| 914 | } |
| 915 | instanceKlassHandle h_cp_entry_f1(thread, (klassOop)cp_entry->f1()); |
| 916 | jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); |
| 917 | JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); |
| 918 | IRT_END |
| 919 | |
| 920 | IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, |
| 921 | oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) |
| 922 | |
| 923 | klassOop k = (klassOop)cp_entry->f1(); |
| 924 | |
| 925 | // check the access_flags for the field in the klass |
| 926 | instanceKlass* ik = instanceKlass::cast(k); |
| 927 | typeArrayOop fields = ik->fields(); |
| 928 | int index = cp_entry->field_index(); |
| 929 | assert(index < fields->length(), "holders field index is out of range"); |
| 930 | // bail out if field modifications are not watched |
| 931 | if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; |
| 932 | |
| 933 | char sig_type = '\0'; |
| 934 | |
| 935 | switch(cp_entry->flag_state()) { |
| 936 | case btos: sig_type = 'Z'; break; |
| 937 | case ctos: sig_type = 'C'; break; |
| 938 | case stos: sig_type = 'S'; break; |
| 939 | case itos: sig_type = 'I'; break; |
| 940 | case ftos: sig_type = 'F'; break; |
| 941 | case atos: sig_type = 'L'; break; |
| 942 | case ltos: sig_type = 'J'; break; |
| 943 | case dtos: sig_type = 'D'; break; |
| 944 | default: ShouldNotReachHere(); return; |
| 945 | } |
| 946 | bool is_static = (obj == NULL); |
| 947 | |
| 948 | HandleMark hm(thread); |
| 949 | instanceKlassHandle h_klass(thread, k); |
| 950 | jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static); |
| 951 | jvalue fvalue; |
| 952 | #ifdef _LP64 |
| 953 | fvalue = *value; |
| 954 | #else |
| 955 | // Long/double values are stored unaligned and also noncontiguously with |
| 956 | // tagged stacks. We can't just do a simple assignment even in the non- |
| 957 | // J/D cases because a C++ compiler is allowed to assume that a jvalue is |
| 958 | // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. |
| 959 | // We assume that the two halves of longs/doubles are stored in interpreter |
| 960 | // stack slots in platform-endian order. |
| 961 | jlong_accessor u; |
| 962 | jint* newval = (jint*)value; |
| 963 | u.words[0] = newval[0]; |
| 964 | u.words[1] = newval[Interpreter::stackElementWords()]; // skip if tag |
| 965 | fvalue.j = u.long_value; |
| 966 | #endif // _LP64 |
| 967 | |
| 968 | Handle h_obj; |
| 969 | if (!is_static) { |
| 970 | // non-static field accessors have an object, but we need a handle |
| 971 | h_obj = Handle(thread, obj); |
| 972 | } |
| 973 | |
| 974 | JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, |
| 975 | fid, sig_type, &fvalue); |
| 976 | IRT_END |
| 977 | |
| 978 | IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) |
| 979 | JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); |
| 980 | IRT_END |
| 981 | |
| 982 | |
| 983 | IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) |
| 984 | JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); |
| 985 | IRT_END |
| 986 | |
| 987 | IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) |
| 988 | { |
| 989 | return (Interpreter::contains(pc) ? 1 : 0); |
| 990 | } |
| 991 | IRT_END |
| 992 | |
| 993 | |
| 994 | // Implementation of SignatureHandlerLibrary |
| 995 | |
| 996 | address SignatureHandlerLibrary::set_handler_blob() { |
| 997 | BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); |
| 998 | if (handler_blob == NULL) { |
| 999 | return NULL; |
| 1000 | } |
| 1001 | address handler = handler_blob->instructions_begin(); |
| 1002 | _handler_blob = handler_blob; |
| 1003 | _handler = handler; |
| 1004 | return handler; |
| 1005 | } |
| 1006 | |
| 1007 | void SignatureHandlerLibrary::initialize() { |
| 1008 | if (_fingerprints != NULL) { |
| 1009 | return; |
| 1010 | } |
| 1011 | if (set_handler_blob() == NULL) { |
| 1012 | vm_exit_out_of_memory(blob_size, "native signature handlers"); |
| 1013 | } |
| 1014 | |
| 1015 | BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", |
| 1016 | SignatureHandlerLibrary::buffer_size); |
| 1017 | _buffer = bb->instructions_begin(); |
| 1018 | |
| 1019 | _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true); |
| 1020 | _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true); |
| 1021 | } |
| 1022 | |
| 1023 | address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { |
| 1024 | address handler = _handler; |
| 1025 | int code_size = buffer->pure_code_size(); |
| 1026 | if (handler + code_size > _handler_blob->instructions_end()) { |
| 1027 | // get a new handler blob |
| 1028 | handler = set_handler_blob(); |
| 1029 | } |
| 1030 | if (handler != NULL) { |
| 1031 | memcpy(handler, buffer->code_begin(), code_size); |
| 1032 | pd_set_handler(handler); |
| 1033 | ICache::invalidate_range(handler, code_size); |
| 1034 | _handler = handler + code_size; |
| 1035 | } |
| 1036 | return handler; |
| 1037 | } |
| 1038 | |
| 1039 | void SignatureHandlerLibrary::add(methodHandle method) { |
| 1040 | if (method->signature_handler() == NULL) { |
| 1041 | // use slow signature handler if we can't do better |
| 1042 | int handler_index = -1; |
| 1043 | // check if we can use customized (fast) signature handler |
| 1044 | if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { |
| 1045 | // use customized signature handler |
| 1046 | MutexLocker mu(SignatureHandlerLibrary_lock); |
| 1047 | // make sure data structure is initialized |
| 1048 | initialize(); |
| 1049 | // lookup method signature's fingerprint |
| 1050 | uint64_t fingerprint = Fingerprinter(method).fingerprint(); |
| 1051 | handler_index = _fingerprints->find(fingerprint); |
| 1052 | // create handler if necessary |
| 1053 | if (handler_index < 0) { |
| 1054 | ResourceMark rm; |
| 1055 | ptrdiff_t align_offset = (address) |
| 1056 | round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; |
| 1057 | CodeBuffer buffer((address)(_buffer + align_offset), |
| 1058 | SignatureHandlerLibrary::buffer_size - align_offset); |
| 1059 | InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); |
| 1060 | // copy into code heap |
| 1061 | address handler = set_handler(&buffer); |
| 1062 | if (handler == NULL) { |
| 1063 | // use slow signature handler |
| 1064 | } else { |
| 1065 | // debugging suppport |
| 1066 | if (PrintSignatureHandlers) { |
| 1067 | tty->cr(); |
| 1068 | tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", |
| 1069 | _handlers->length(), |
| 1070 | (method->is_static() ? "static" : "receiver"), |
| 1071 | method->name_and_sig_as_C_string(), |
| 1072 | fingerprint, |
| 1073 | buffer.code_size()); |
| 1074 | Disassembler::decode(handler, handler + buffer.code_size()); |
| 1075 | #ifndef PRODUCT |
| 1076 | tty->print_cr(" --- associated result handler ---"); |
| 1077 | address rh_begin = Interpreter::result_handler(method()->result_type()); |
| 1078 | address rh_end = rh_begin; |
| 1079 | while (*(int*)rh_end != 0) { |
| 1080 | rh_end += sizeof(int); |
| 1081 | } |
| 1082 | Disassembler::decode(rh_begin, rh_end); |
| 1083 | #endif |
| 1084 | } |
| 1085 | // add handler to library |
| 1086 | _fingerprints->append(fingerprint); |
| 1087 | _handlers->append(handler); |
| 1088 | // set handler index |
| 1089 | assert(_fingerprints->length() == _handlers->length(), "sanity check"); |
| 1090 | handler_index = _fingerprints->length() - 1; |
| 1091 | } |
| 1092 | } |
| 1093 | } else { |
| 1094 | CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
| 1095 | } |
| 1096 | if (handler_index < 0) { |
| 1097 | // use generic signature handler |
| 1098 | method->set_signature_handler(Interpreter::slow_signature_handler()); |
| 1099 | } else { |
| 1100 | // set handler |
| 1101 | method->set_signature_handler(_handlers->at(handler_index)); |
| 1102 | } |
| 1103 | } |
| 1104 | assert(method->signature_handler() == Interpreter::slow_signature_handler() || |
| 1105 | _handlers->find(method->signature_handler()) == _fingerprints->find(Fingerprinter(method).fingerprint()), |
| 1106 | "sanity check"); |
| 1107 | } |
| 1108 | |
| 1109 | |
| 1110 | BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; |
| 1111 | address SignatureHandlerLibrary::_handler = NULL; |
| 1112 | GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; |
| 1113 | GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; |
| 1114 | address SignatureHandlerLibrary::_buffer = NULL; |
| 1115 | |
| 1116 | |
| 1117 | IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method)) |
| 1118 | methodHandle m(thread, method); |
| 1119 | assert(m->is_native(), "sanity check"); |
| 1120 | // lookup native function entry point if it doesn't exist |
| 1121 | bool in_base_library; |
| 1122 | if (!m->has_native_function()) { |
| 1123 | NativeLookup::lookup(m, in_base_library, CHECK); |
| 1124 | } |
| 1125 | // make sure signature handler is installed |
| 1126 | SignatureHandlerLibrary::add(m); |
| 1127 | // The interpreter entry point checks the signature handler first, |
| 1128 | // before trying to fetch the native entry point and klass mirror. |
| 1129 | // We must set the signature handler last, so that multiple processors |
| 1130 | // preparing the same method will be sure to see non-null entry & mirror. |
| 1131 | IRT_END |
| 1132 | |
| 1133 | #if defined(IA32) || defined(AMD64) |
| 1134 | IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) |
| 1135 | if (src_address == dest_address) { |
| 1136 | return; |
| 1137 | } |
| 1138 | ResetNoHandleMark rnm; // In a LEAF entry. |
| 1139 | HandleMark hm; |
| 1140 | ResourceMark rm; |
| 1141 | frame fr = thread->last_frame(); |
| 1142 | assert(fr.is_interpreted_frame(), ""); |
| 1143 | jint bci = fr.interpreter_frame_bci(); |
| 1144 | methodHandle mh(thread, fr.interpreter_frame_method()); |
| 1145 | Bytecode_invoke* invoke = Bytecode_invoke_at(mh, bci); |
| 1146 | ArgumentSizeComputer asc(invoke->signature()); |
| 1147 | int size_of_arguments = (asc.size() + (invoke->is_invokestatic() ? 0 : 1)); // receiver |
| 1148 | Copy::conjoint_bytes(src_address, dest_address, |
| 1149 | size_of_arguments * Interpreter::stackElementSize()); |
| 1150 | IRT_END |
| 1151 | #endif |